#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Create by zhang
# Create on 2022/7/26 21:58
class StrContentConstant:
    LETTER_LOWER = "abcdefghijklmnopqrstuvwxyz"
    LETTER_UPPER = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    NUMBER = "0123456789"